Darker Than Black: Shikkoku no Hana
From BH007: Once, in the middle (Tokyo), the gates of hell appeared. In the area covered with the door, the laws of physics do not apply. In addition, people living nearby have begun to develop supernatural forces and are known as contractors. Among these contractors-BK201, the contractor with power over zippers, which is known as one of the strongest reapers and for some reason hate and persecuted by the majority of major world organizations ...